I was educated at a public school, went to college on tuition funded by scholarships, where I learned things written in public libraries by people studying with public funds, now I commute physically on public roads and digital cables...
Anything I accomplish is tied up in our shared history. To say that the unique things I built are attributable to me and me alone is to ignore that someone else with the same knowledge and the same problems would likely come up with the same ingenious solutions.